Philipp Holzmann Aktiengesellschaft

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5186217 Fluid-impervious structure and method of making sameExpiredOct 19, 90Feb 16, 93[F16L]
5174394 Apparatus for cleaning layers of earthExpiredSep 30, 91Dec 29, 92[E02D, E21B]
5069725 Method and apparatus for cleaning layers of earthExpiredMar 31, 89Dec 03, 91[B08B]
5061119 Method and apparatus for the remediation of contaminated soilsExpiredAug 17, 90Oct 29, 91[B09B]
5018639 Storage container for low-temperature liquidsExpiredApr 20, 90May 28, 91[E03B]
4844662 Sealing barrier for subterranean purposesExpiredJun 20, 88Jul 04, 89[E02D]
4662134 Cryogenic wedge-type anchor for stranded tension cablesExpiredSep 26, 85May 05, 87[E04C]
4662773 Segmental tunnel lining consisting of reinforced concrete tubbingsExpiredApr 08, 83May 05, 87[E21D]
4630798 Method and device for erecting building structures such as bridges, using pre-fabricated concrete beamsExpiredNov 01, 84Dec 23, 86[E01D]
4499699 Molding device for sub-soil curtain wall sectionsExpiredMar 30, 83Feb 19, 85[E04B, E04G]
4492087 Container for storing refrigerated liquidsExpiredJun 13, 83Jan 08, 85[F17C]
4434591 Component useful in producing a cooling towerExpiredOct 20, 80Mar 06, 84[E04B]
4407098 Liquid storage tank with steel-reinforced concrete exteriorExpiredApr 10, 81Oct 04, 83[E04B]
4355453 Method of protecting the surfaces of concrete structuresExpiredNov 14, 80Oct 26, 82[B23P]
4332508 Shield for tunneling and miningExpiredFeb 25, 80Jun 01, 82[E21D]
4298230 Tunnelling apparatusExpiredJun 12, 80Nov 03, 81[E21D]
4255366 Process of producing a cooling towerExpiredDec 28, 78Mar 10, 81[E04B]
4253781 Method and an apparatus for providing a grouted anchorage against hydrostatic pressureExpiredMar 08, 79Mar 03, 81[E21D, E02D]
4249870 Climbing framework for erecting concrete forms in the manufacture of straight or curved reinforced concrete wallsExpiredDec 29, 78Feb 10, 81[B28B]

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